Safe removal: It should show warning before deleting and allow you to delete duplicates by moving them to Trash. Preview feature: A preview feature is necessary so that you can conveniently view the duplicate pictures you are handling and deleting. When dealing with them, you should use a duplicate photo finder safely designed for Photos. Support for Apple Photos: Duplicates in Photos app can be the main source of duplicate photos on Mac.
Cisdem Duplicate Finder Easily Delete Duplicate Photos on Mac